Patents by Inventor Gerhard Rohlfing
Gerhard Rohlfing has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11143180Abstract: The invention concerns a method and an apparatus for operating a multi-phase pump which has a suction-side inlet (10) and a discharge-side outlet (20) and which pumps a multi-phase mixture charged with solids, comprising the following steps: a. pumping a multi-phase mixture into a discharge-side separation chamber (45), b. separating a gaseous phase from a liquid phase and a solid phase in the separation chamber (45), c. separating the liquid phase from the solid phase in the separation chamber (45), and d. supplying a portion of the liquid phase freed from the solid phase to the suction side.Type: GrantFiled: May 23, 2017Date of Patent: October 12, 2021Assignee: ITT Bornemann GmbHInventors: Gerhard Rohlfing, Jens-Uwe Brandt
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Publication number: 20170254328Abstract: The invention concerns a method and an apparatus for operating a multi-phase pump which has a suction-side inlet (10) and a discharge-side outlet (20) and which pumps a multi-phase mixture charged with solids, comprising the following steps: a. pumping a multi-phase mixture into a discharge-side separation chamber (45), b. separating a gaseous phase from a liquid phase and a solid phase in the separation chamber (45), c. separating the liquid phase from the solid phase in the separation chamber (45), and d. supplying a portion of the liquid phase freed from the solid phase to the suction side.Type: ApplicationFiled: May 23, 2017Publication date: September 7, 2017Inventors: Gerhard ROHLFING, Jens-Uwe BRANDT
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Patent number: 9689385Abstract: The invention concerns a method and an apparatus for operating a multi-phase pump which has a suction-side inlet (10) and a discharge-side outlet (20) and which pumps a multi-phase mixture charged with solids, comprising the following steps: a. pumping a multi-phase mixture into a discharge-side separation chamber (45), b. separating a gaseous phase from a liquid phase and a solid phase in the separation chamber (45), c. separating the liquid phase from the solid phase in the separation chamber (45), and d. supplying a portion of the liquid phase freed from the solid phase to the suction side.Type: GrantFiled: July 31, 2013Date of Patent: June 27, 2017Assignee: ITT Bornemann GmbHInventors: Gerhard Rohlfing, Jens-Uwe Brandt
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Patent number: 9494016Abstract: The invention relates to a collecting tank for multi-phase mixtures from a hydrocarbon source, having at least one inlet (20) for introducing multi-phase mixtures into the collecting tank (10), and having a plurality of outlet connectors (30), which can be connected to pumps (3) via which multi-phase mixtures are pumped, the outlet connectors (30) being assigned inwardly directed internals (40) which project upwards beyond the collecting-tank base (11) and have a first, upper opening (42) and a second, lower opening (41), wherein the flow cross section of the lower opening (41) is smaller than that of the upper opening (42).Type: GrantFiled: April 27, 2011Date of Patent: November 15, 2016Assignee: ITT Bornemann GmbHInventors: Axel Jaeschke, Gerhard Rohlfing, Jens-Uwe Brandt, Marco Bredemeier geb Drewniok, Mark Reichwage
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Publication number: 20150226214Abstract: The invention concerns a method and an apparatus for operating a multi-phase pump which has a suction-side inlet (10) and a discharge-side outlet (20) and which pumps a multi-phase mixture charged with solids, comprising the following steps: a. pumping a multi-phase mixture into a discharge-side separation chamber (45), b. separating a gaseous phase from a liquid phase and a solid phase in the separation chamber (45), c. separating the liquid phase from the solid phase in the separation chamber (45), and d. supplying a portion of the liquid phase freed from the solid phase to the suction side.Type: ApplicationFiled: July 31, 2013Publication date: August 13, 2015Inventors: Gerhard Rohlfing, Jens-Uwe Brandt
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Publication number: 20130233390Abstract: The invention relates to a collecting tank for multi-phase mixtures from a hydrocarbon source, having at least one inlet (20) for introducing multi-phase mixtures into the collecting tank (10), and having a plurality of outlet connectors (30), which can be connected to pumps (3) via which multi-phase mixtures are pumped, the outlet connectors (30) being assigned inwardly directed internals (40) which project upwards beyond the collecting-tank base (11) and have a first, upper opening (42) and a second, lower opening (41), wherein the flow cross section of the lower opening (41) is smaller than that of the upper opening (42).Type: ApplicationFiled: April 27, 2011Publication date: September 12, 2013Applicant: JOH. HEINR. BORNEMANN GMBHInventors: Axel Jaeschke, Gerhard Rohlfing, Jens-Uwe Brandt, Marco Bredemeier geb Drewniok, Mark Reichwage
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Patent number: 7862315Abstract: A screw displacement pump is provided. The screw displacement pump is of single-entry, double-shaft construction with an external bearing of the two screw shafts. A pump housing encloses the screw shafts by forming feed chambers and externally delimiting the feed chambers with its internal shell surface, as well as a suction chamber for the medium to be induced and a pressure chamber to accommodate the medium pumped by the screw shafts. The pump housing is inserted into a pressure housing and attached to the pressure housing, so that the pressure chamber encloses the pump, at least in part.Type: GrantFiled: May 31, 2006Date of Patent: January 4, 2011Assignee: Joh.Heinr.Bornemann GmbHInventors: Gerhard Rohlfing, Axel Jaeschke, Jens-Uwe Brandt
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Patent number: 7810572Abstract: The object of the invention is to improve delivery of the multi-phase mixture, in particular hydrocarbons from a well, and to limit the free gas volume. According to the invention, this object is attained in that a partial liquid flow (13) is split off on the pressure side from the main delivery flow and guided to the high-pressure side of at least one ejector pump (2) arranged on the suction side as an auxiliary delivery device. The pump installation provides a feed line (7) connecting the pressure chamber of the displacement pump (1) with the high-pressure side of at least one ejector pump (2), whereby the ejector pump (2) is arranged on the suction side in the delivery direction of the displacement pump (1).Type: GrantFiled: October 21, 2004Date of Patent: October 12, 2010Assignee: Joh. Heinr. Bornemann GmbHInventors: Jens Uwe Brandt, Gerhard Rohlfing, Dietrich Mueller-Link
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Publication number: 20080210436Abstract: The object of the invention is to improve delivery of the multi-phase mixture, in particular hydrocarbons from a well, and to limit the free gas volume. According to the invention, this object is attained in that a partial liquid flow (13) is split off on the pressure side from the main delivery flow and guided to the high-pressure side of at least one ejector pump (2) arranged on the suction side as an auxiliary delivery device. The pump installation provides a feed line (7) connecting the pressure chamber of the displacement pump (1) with the high-pressure side of at least one ejector pump (2), whereby the ejector pump (2) is arranged on the suction side in the delivery direction of the displacement pump (1).Type: ApplicationFiled: October 21, 2004Publication date: September 4, 2008Applicant: JOH. HEINR. BORNEMANN GMBHInventors: Jens Uwe Brandt, Gerhard Rohlfing, Dietrich Mueller-Link
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Publication number: 20080199340Abstract: The invention relates to a screw pump of single-entry, double-shaft construction with an external bearing of the two screw shafts (1, 2) and a pump housing (3) enclosing the screw shafts (1, 2) by forming feed chambers (4) and externally delimiting the feed chambers (4) with its internal shell surface (3a), as well as a suction chamber (5) for the medium to be induced and a pressure chamber (6) to accommodate the medium pumped by the screw shafts (1, 2). The pump housing (3) is inserted into a pressure housing (7) and attached to the pressure housing (7), so that the pressure chamber (6) encloses the pump housing (3) at least in part.Type: ApplicationFiled: May 31, 2006Publication date: August 21, 2008Inventors: Gerhard Rohlfing, Axel Jaeschke, Jens-Uwe Brandt
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Patent number: 6129533Abstract: The invention relates to a fluid-conveying machine, in particular, a pump having a component rotating in a stationary housing part inside an annular gap. The stationary housing part separates an interior having a higher product pressure from an exterior having a lower pressure. A rotating component is mounted in an external bearing which is sealed with respect to the interior via a sealing system. In order to improve the sealing, the invention provides that the annular gap is formed between two sliding bearing shells which comprise extremely hard, wear-resistant materials and, in accordance with the operating principle of a radial sliding bearing, form a first pressure-reducing stage. A feedback device, which feeds back the leakage from this first sealing stage into the conveying process of the machine, is connected downstream of the first pressure-reducing stage. A second sealing stage is arranged axially downstream of the feedback device.Type: GrantFiled: March 18, 1999Date of Patent: October 10, 2000Assignee: Joh. Heinr. Bornemann GmbHInventors: Jens-Uwe Brandt, Gerhard Rohlfing, Vejen Hristov
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Patent number: 5624249Abstract: The invention relates to a pumping process for operating a multi-phase screw pump with at least one feed screw surrounded by a housing having at least one inlet on one side and at least one outlet at its top, in which the intake medium is conveyed parallel to the screw shaft in a continuous low-pulsed stream and continuously discharged at the outlet. This invention also relates to a multi-phase screw pump. In order to prevent the drawbacks usually occurring in dry running phases, the invention proposes that a partial liquid volume flow (liquid circulation) be separated on the pressure side and returned in metered quantities into the intake regions and thus kept in circulation.Type: GrantFiled: October 6, 1995Date of Patent: April 29, 1997Assignee: Joh. Heinrich Bornemann GmbH & Co. KGInventor: Gerhard Rohlfing
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Patent number: 5472319Abstract: An eccentric screw pump with a pump casing (1) having an intake stub (6) and a delivery stub (7) and enclosing a suction chamber (8) and a delivery chamber (9). A stator (2) arranged in the said casing surrounds a rotor (3) that can be driven by a motor. In order to permit multi-phase delivery, a lower portion (9a) of the delivery chamber (9) is connected to the suction chamber (8) via a liquid bypass line having a valve opening (13) that can be actuated by a control element on the basis of the differential pressure between the delivery and the suction chambers (9, 8) in such a way that the valve (13, 14) is open in the case of the differential pressure which arises in the delivery of dry-running gas but is closed in the case of the differential pressure which arises during the delivery of liquid.Type: GrantFiled: September 7, 1994Date of Patent: December 5, 1995Assignee: Joh. Heinrich Bornemann GmbH & Co. KGInventors: Gerhard Rohlfing, Jens-Uwe Brandt